<template>
  <el-card class="category-container">
    <template #header>
      <div class="header">
        <el-button type="primary" :icon="Plus" @click="handleAdd">增加</el-button>
        <el-popconfirm title="确定删除吗？" confirmButtonText='确定' cancelButtonText='取消' @confirm="handleDelete">
          <template #reference>
            <el-button type="danger" :icon="Delete">批量删除</el-button>
          </template>
        </el-popconfirm>
      </div>
    </template>
    <el-table :load="state.loading" ref="multipleTable" :data="state.tableData" tooltip-effect="dark"
      style="width: 100%" @selection-change="handleSelectionChange">
      <el-table-column type="selection" width="55">
      </el-table-column>
      <el-table-column prop="categoryName" label="分类名称">
      </el-table-column>
      <el-table-column prop="categoryRank" label="排序值">
      </el-table-column>
      <el-table-column prop="createTime" label="添加时间">
      </el-table-column>
      <el-table-column label="操作" width="220">
        <template #default="scope">
          <el-button type="primary" style="margin-right: 10px;" @click="handleEdit(scope.row.categoryId)">修改</el-button>
          <el-dropdown size="small" :hide-on-click="false" :hide-timeout="500">
            <el-button type="primary">
              更多<el-icon class="el-icon--right"><arrow-down /></el-icon>
            </el-button>
            <template #dropdown>
              <el-dropdown-menu>
                <el-dropdown-item v-if="scope.row.status == 0"><span
                    @click="handleStatus(scope.row.categoryId, 1)">下架</span></el-dropdown-item>
                <el-dropdown-item v-if="scope.row.status == 1"><span
                    @click="handleStatus(scope.row.categoryId, 0)">上架</span></el-dropdown-item>
                <el-dropdown-item><span @click="handleNext(scope.row)">下级分类</span></el-dropdown-item>
                <el-dropdown-item>
                  <el-popconfirm title="确定删除吗？" confirmButtonText='确定' cancelButtonText='取消'
                    @confirm="handleDeleteOne(scope.row.categoryId)">
                    <template #reference>
                      <a style="cursor: pointer">删除</a>
                    </template>
                  </el-popconfirm></el-dropdown-item>
              </el-dropdown-menu>
            </template>
          </el-dropdown>
        </template>
      </el-table-column>
    </el-table>
    <!--总数超过一页，再展示分页器-->
    <el-pagination background layout="total,prev, pager, next,jumper" :page-sizes="[10, 20, 50, 100]"
      :total="state.total" :page-size="state.pageSize" :current-page="state.currentPage" @current-change="changePage" />
    <DialogAddCategory ref='addCate' :reload="getCategory" :type="state.type" />
  </el-card>
</template>

<script setup>
import { onMounted, onUnmounted, reactive, ref, toRefs, watchEffect } from 'vue'
import { useRoute, useRouter } from 'vue-router'
import { ElMessage } from 'element-plus'
import { Plus, Delete } from '@element-plus/icons-vue'
import axios from '@/utils/axios'
import DialogAddCategory from '@/components/DialogAddCategory.vue'

const addCate = ref(null)
const router = useRouter() // 声明路由实例
const route = useRoute() // 获取路由参数
const state = reactive({
  loading: false,
  tableData: [], // 数据列表
  multipleSelection: [], // 选中项
  total: 0, // 总条数
  currentPage: 1, // 当前页
  pageSize: 10, // 分页大小
  type: 'add', // 操作类型
  level: 1,
  parent_id: 0
})
onMounted(() => {
  getCategory()
})
watchEffect(() => {
  console.log(state.pageSize)
})
const unwatch = router.afterEach((to) => {
  // 每次路由变化的时候，都会触发监听时间，重新获取列表数据
  if (['category', 'level2', 'level3'].includes(to.name)) {
    getCategory()
  }
})
onUnmounted(() => {
  unwatch()
})
const handleStatus = (id, status) => {
  axios.get(`/setCarousels/${id}/${status}`).then(() => {
    ElMessage.success('修改成功')
    getCategory()
  })
}
// 获取分类列表
const getCategory = () => {
  const { level = 1, parent_id = 0 } = route.query
  state.loading = true
  axios.get('/categories', {
    params: {
      pageNumber: state.currentPage,
      pageSize: state.pageSize,
      categoryLevel: level,
      parentId: parent_id
    }
  }).then(res => {
    state.tableData = res.list
    state.total = res.totalCount
    state.currentPage = res.currPage
    state.loading = false
    state.level = level
    state.parentId = parent_id
  })
}
const changePage = (val) => {
  state.currentPage = val
  getCategory()
}
const handleNext = (item) => {
  const levelNumber = item.categoryLevel + 1
  if (levelNumber == 4) {
    ElMessage.error('没有下一级')
    return
  }
  router.push({
    name: `level${levelNumber}`,
    query: {
      level: levelNumber,
      parent_id: item.categoryId
    }
  })
}
// 添加分类
const handleAdd = () => {
  state.type = 'add'
  addCate.value.open()
}
// 修改分类
const handleEdit = (id) => {
  state.type = 'edit'
  addCate.value.open(id)
}
// 选择项
const handleSelectionChange = (val) => {
  state.multipleSelection = val
}
// 批量删除
const handleDelete = () => {
  if (!state.multipleSelection.length) {
    ElMessage.error('请选择项')
    return
  }
  axios.delete('/categories', {
    data: {
      ids: state.multipleSelection.map(i => i.categoryId)
    }
  }).then(() => {
    ElMessage.success('删除成功')
    getCategory()
  })
}
// 单个删除
const handleDeleteOne = (id) => {
  axios.delete('/categories', {
    data: {
      ids: [id]
    }
  }).then(() => {
    ElMessage.success('删除成功')
    getCategory()
  })
}
</script>

<style></style>